Dulles Airport, VA

10:40 AM EDT on October 15, 2019 (GMT -0400)
Washington Dulles International

Weather History for KIAD - August, 2019

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Week of August 25, 2019 through August 31, 2019

  Max Avg Min Sum
Temperature  
Max Temperature 89 °F 81 °F 73 °F
Mean Temperature 75 °F 71 °F 68 °F
Min Temperature 70 °F 62 °F 55 °F
Degree Days  
Heating Degree Days (base 65) 0 0 0 0
Cooling Degree Days (base 65) 10 6 2 44
Growing Degree Days (base 50) 25 21 18 168
Dew Point  
Dew Point 68 °F 60 °F 52 °F
Precipitation  
Precipitation 0.27 in 0.04 in 0.00 in 0.28 in
Snowdepth - - - -
Wind  
Wind 30 mph 4 mph 0 mph
Gust Wind 37 mph 25 mph 20 mph
Sea Level Pressure  
Sea Level Pressure 30.26 in 30.09 in 29.85 in

Weekly Weather History Graph

Weekly Weather History Graph

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Astronomy

Aug. 25, 2019 Rise Set
Actual Time 6:32 AM EDT 7:51 PM EDT
Civil Twilight 6:04 AM EDT 8:18 PM EDT
Nautical Twilight 5:31 AM EDT 8:51 PM EDT
Astronomical Twilight 4:56 AM EDT 9:26 PM EDT
Moon 1:07 AM EDT (8/25) 4:07 PM EDT (8/25)
Length of Visible Light 14h 14m
Length of Day
13h 18m
Waning Crescent, 29% of the Moon is Illuminated
Aug 25
Waning Crescent
Aug 30
New
Sep 5
First Quarter
Sep 14
Full
Sep 21
Last Quarter

Daily Weather History & Observations

2019 Temp. (°F) Dew Point (°F) Humidity (%) Sea Level Press. (in) Visibility (mi) Wind (mph) Precip. (in) Events
Aug high avg low high avg low high avg low high avg low high avg low high avg high sum  
25 79 70 62 57 55 52 80 61 44 30.23 30.19 30.15 10.0 10.0 10.0 15 6 20 0.00  
26 75 68 60 59 57 55 86 72 55 30.20 30.16 30.09 10.0 10.0 10.0 12 6 - 0.00  
27 79 70 61 65 62 58 90 77 62 30.12 30.03 29.95 10.0 9.8 7.0 8 2 - 0.01 Rain
28 82 72 64 68 66 64 97 82 64 29.96 29.89 29.85 10.0 8.8 2.0 30 5 37 0.27 Fog , Rain , Thunderstorm
29 82 70 57 63 56 53 93 64 37 30.04 29.99 29.92 10.0 10.0 10.0 14 5 22 0.00  
30 89 71 55 62 58 54 93 64 38 30.10 30.06 30.02 10.0 10.0 10.0 7 2 - 0.00 Fog
31 86 75 64 66 63 61 90 65 49 30.25 30.18 30.11 10.0 10.0 10.0 12 5 - 0.00  
2019 Temp. (°F) Dew Point (°F) Humidity (%) Sea Level Press. (in) Visibility (mi) Wind (mph) Precip. (in) Events
Sep high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 73 72 70 61 60 60 73 68 64 30.26 30.25 30.25 10.0 10.0 10.0 6 5 - 0.00